Nortel Circuit Card Installation Manual page 895

Table 279
NTAK03, NTDK20, and NTDK97 A-Law tones and cadences (Part 4 of 9)
Tone # Frequency (Hz)
125 940/1480
126 700/1630
127 770/1630
128 850/1630
129 350/440
130
131
132 400/450
133 1400
134
135 1400
136 1800
137
138 940/1630
139 700/1210
140 700/1340
141 700/1480
142 770/1210
143 770/1340
144 770/1480
145 850/1210
dB below
overload
-12/-10
-12/-10
-12/-10
-12/-10
-22/-22
400
400
-22/-22
950
420
-18/-17
-18/-17
-18/-17
-18/-17
-18/-17
-18/-17
-18/-17
-18/-17
The TDS/DTR card
Precision
Ringing
Tones
÷
-19 ÷
-25 ÷
÷
-15 ÷
-19 ÷
-20 ÷
-20 ÷
-19 ÷
Circuit Card
Page 895 of 906
DTMF
Digits MF Digits
#
F0
F
I
P
1
2
3
4
5
6
7
Description and Installation